I bought a new BT Cruiser BT 5245 this spring and can confirm shoddy workmanship.
The doorframe to the bathroom is so warped that the door will not latch, sometimes by 2 inches. The service guy removed the striker plate to that door and the hole underneath was not only oversized, but looked as though it had been dug out with a dull screwdriver. The bedroom side wall panel is not fastened to the studs. Apparently the nail gun ran out of nails and the worker kept right on going. Small holes where there should be nails.
Cabinet doors are not aligned. Numerous small issues. No hold-open catches for top hinged outside bins. Very little storage, inside or out.
And why do they make mattresses so darn hard? This, of course, is not limited to Gulfstream. But the silly split mattress cannot be replaced by a softer one. Sigh.....
That said, I still like the darn thing, and the Ford E-350 chassis hauls the horse trailer just fine. I don't know of any other small RV that meets our travel and hauling needs so well.